The ability to impart knowledge and command respect is the essential qualification for teachers.

传授知识并博得尊敬的能力对老师们来说是基本的条件。

《柯林斯英汉双解大词典》

So we've been talking about nutrients, the elements in the environment that are essential for living organisms to develop, live a healthy life, and reproduce.

所以我们一直在讨论营养，环境中的元素对于生物体的发展，健康的生活和繁殖是必不可少的。

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"About half of my soaps have no added essential oils, it's for people with very sensitive skin who want to avoid essential oils for any reason.

VOA: special.2011.03.09

Well--just like we didn't have to follow the parts of the body that aren't essential for housing the personality.

我们不需要去管,那些对于储存人格特性并非必要的,身体部位。

耶鲁公开课 - 死亡课程节选

That's not to say that sacrifice is abolished, it's not to say that sacrifice isn't important to Deuteronomy--very far from it, it's an essential part of God's service for Deuteronomy.

也就是说献祭被摒弃了，并不是说在申命记,中献祭不再重要，远不是那样，这是申命记中最核心的侍奉上帝的方式之一。

耶鲁公开课 - 旧约导论课程节选

We believe that when it comes to Middle East peace between the Israelis and Palestinians, it is essential for direct face-to-fact negotiations to resume, and it is essential for each side to refrain from taking unilateral actions that make it more difficult to engage in face-to-face negotiations, and to allow that process to proceed to a point where a sustainable peace is possible.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

Indeed, Drucker felt that a mission statement was as essential to the for-profit enterprise as to the non-profit one, and he stressed that failing to create one that was about more than money was bad for business.

FORBES: Cut to the Chase: Why You Should Articulate Your Mission in Eight Words or Fewer

Habibie bargained with the Fund for subsidies on essential goods to continue for a time.

CNN: COLD WAR OVER HOT MONEY